*{
    margin: 0;
    padding: 0;
}
.content{
    margin-left: auto;
    margin-right: auto;
    cursor: pointer;
    width: 600px;
    height: 400px;
    position: relative;
}
#list img{
    position: absolute;
}
#list img:not(:first-child){
    display: none;
}
.content button{
    position: absolute;
    background: url(../images/icon-slides.png);
    width: 40px;
    height: 70px;
    border: none;
    top: 50%;
    transform: translateY(-50%);
}
.content #next{
    right: 0;
    background-position-x: 125px;
}
.content #btns{
    position: absolute;
    width: 180px;
    left: 50%;
    transform: translateX(-50%);
    bottom: 10px;
    cursor: pointer;
}
.content #btns span{
    display: inline-block;
    width: 20px;
    height: 20px;
    background-color: rgba(44,44,44,.3);
    left: 50%;
    top: 50%;
    transform: translate(-50% -50%);
    border-radius: 50%;
    border: 1px solid white;
    margin: 0 5px;
}
.content #btns .current{
    background-color: orangered;
}